252533540 has 24 divisors (see below), whose sum is σ = 606080832. Its totient is φ = 86582880.

The previous prime is 252533509. The next prime is 252533543. The reversal of 252533540 is 45335252.

252533540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (252533543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 901766 + ... + 902045.

It is an arithmetic number, because the mean of its divisors is an integer number (25253368).

Almost surely, 2^252533540 is an apocalyptic number.

252533540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

252533540 is an abundant number, since it is smaller than the sum of its proper divisors (353547292).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

252533540 is a wasteful number, since it uses less digits than its factorization.

252533540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1803827 (or 1803825 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 29.

The square root of 252533540 is about 15891.3039112591. The cubic root of 252533540 is about 632.0814167664.

Adding to 252533540 its reverse (45335252), we get a palindrome (297868792).

The spelling of 252533540 in words is "two hundred fifty-two million, five hundred thirty-three thousand, five hundred forty".